I did dry humping with my boyfriend on the 5th day of my period. I was in my pajama shorts and underwear. He was in his boxers and underwear. He didn't cum. But I felt some moisture on my shorts. It could have been his precum. My period didn't arrive since then. After 2 weeks of missed period, and 35 days after the above incident, I got worried amd took a pregnancy test. It was negative. Now my periods are late for three weeks. Can I get pregnant from this act? Is it even theoretically possible to get pregnant with dry humping, without ejaculation, through 4 layers of clothing. I'm very worried. Why is my period not arriving?